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All ctdb specific code is isolated in samba-cluster-support.so now.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Mon Mar 24 19:08:44 CET 2014 on sn-devel-104
This is better than a compile time check for
HAVE_CTDB_CONTROL_CHECK_SRVIDS_DECL.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This allows runtime selection of libsamba-cluster-support.so
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This gets all dummy functions for the build without CLUSTER_SUPPORT.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
gencache_parse calling tdb shows up in profiles when we do a lot of open/close
traffic with large ACLs. For every file we convert unix ids to sids, and in the
domain member case this goes through gencache.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Mar 11 19:56:47 CET 2014 on sn-devel-104
This avoids issues with whatever sys.platform may return, fixes the
order of arguments to the CHECK_FUNCS_IN call, and only runs after
Linux-style POSIX ACL detection fails.
Andrew Bartlett
Change-Id: I930dff1e03c1cd1ceb8f3a35823ceb805694b66a
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Tested-by: Thomas Schulz <schulz@adi.com>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>
Reviewed-by: Simo Sorce <simo@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
The current could would crash if a pthreadpool was created, deleted and the
process then fork()s. "pthreadpools" is NULL in this case, but the
pthread_atfork handlers are in place. This fixes walking the pthreadpools list
in reverse.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kamen Mazdrashki <kamenim@samba.org>
Reviewed-by: Simo Sorce <simo@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
If the same process tries to re-lock the same record
it has already locked, don't go to the ctdbd again.
There are situations where we already have a lock on a record
and then do a dbwrap_parse_record() on that record, for instance
in locking code:
do_lock()
-> grabs lock on brl record with brl_get_locks()
-> calls brl_lock()
-> calls brl_lock_posix or _windows_default()
-> calls contend_level2_oplocks_begin()
-> calls brl_locks_get_read_only()
-> calls dbwrap_parse_record on the same brl record as above
In the local (tdb) case, this is not a problem, because
identical fcntl locks in the same process don't contend each other,
but calling out to ctdb for this lets smbd and ctdb deadlock.
db_ctdb_fetch_lock() already correclty checks first
whether we can simply try to lock locally. But db_ctdb_parse_record()
failed to do so for empty records, i.e. records that only
consist of the ctdb record header. (These can be deleted records
but can also be freshly created and still empty records.)
This patch lets db_ctdb_parse_record() not skip local access
for empty records, hence fixing the deadlock.
PLAN: In the long run, it would be better to solve this
generically on the dbwrap_layer, i.e. root the notion of
an already locked record there, and skip any call to the
db (tdb or ctdb backend) if we have it. This would also
solve the problem for all calls like fetch_locked, parse_record
and possibly others. But this is the urgent fix for now.
Pair-Programmed-With: Volker Lendecke <vl@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Tested-by: Björn Baumbach <bb@sernet.de>
We have messaging_send_buf, so there's no point to use an explicit
DATA_BLOB here.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Christof Schmitt <cs@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Tue Feb 25 23:27:21 CET 2014 on sn-devel-104
If it returns true the passed ip address matched and we
let a nested ctdb operation fail with NT_STATUS_ADDRESS_CLOSED.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Kai Blin <kai@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Feb 20 22:58:59 CET 2014 on sn-devel-104
The current messaging implementation is based on a tdb indexed by server_id. If
we have more than one messaging context in a process, messages might not arrive
at the right context and be dropped, depending on which signal handler is
triggered first.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is not used in other parts of source3, so this patch improves
modularity and isolation of features.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
This removes the ability to set paths like the sbindir, bindir, and changes the tool for setting lockdir
statedir etc to be via --option="lock dir=/var/lock".
These were originally added by commit 90a6873b05
by James Peach <jpeach@samba.org>
The important use case, qemu, does not use these options, but specifies these directories via an smb.conf.
They are being removed to remove a layer from the loadparm system, now that options
can be specified from the command line. It will also make it easier to generate the affected
parameters from the XML documentation if this layer of indirection is removed.
Andrew Bartlett
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Feb 12 16:42:14 CET 2014 on sn-devel-104
The build system gives these two parameters different defaults
(compared with lock dir) in both the --enable-fhs and default mode, so
the logic to use lock dir no longer applies unless the build has been
very specially constructed.
Therefore, remove the special case handling and make these normal
parameters again.
Reviewed-by: Garming Sam <garming@catalyst.net.nz>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
Signed-off-by: Garming Sam <garming@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Feb 8 03:31:34 CET 2014 on sn-devel-104
instead of the hand written test.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Feb 7 18:05:51 CET 2014 on sn-devel-104
To be consistent with db_open() and prepare for future
possible extensions.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
For non-persistent databases we try to use CTDB_CONTROL_SET_DB_READONLY
in order to make use of readonly records.
Pair-Programmed-With: Michael Adam <obnox@samba.org>
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Michael Adam <obnox@samba.org>
This is in preparation of directly supporting ctdb read only
record copies when opening a ctdb database from samba.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
This is in preparation to support handing flags to backends,
in particular activating read only record support for ctdb
databases. For a start, this does nothing but adding the
parameter, and all databases use DBWRAP_FLAG_NONE.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Tue Jan 28 19:06:40 CET 2014 on sn-devel-104
This is made to replace the msg_channel abstraction.
msg_channel was created to not miss any messages. For this, some
complex queueing was installed. This complexity has caused quite a
few problems in the past (see bug 10284 for example).
messaging_read_send/recv is able to achieve the same goal with a
lot less complexity. The messaging_read_send atomically installs
the reader into the messaging_context, we will not miss any messages
while this installed. messaging_send_recv will deinstall that
listener, but in the callback function you can directly call
messaging_read_send again without going through the tevent_loop_once.
As long as this is always made sure, no messages will be lost.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
This is more better than a custom tevent_req destructor.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Jan 17 14:34:06 CET 2014 on sn-devel-104
In tldap_msg_received() we call tevent_req_error() for more than
one request, if we do that we need to use tevent_req_defer_callback()
otherwise we're likely to crash, as a triggered callback may
invalidate our state.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This is more better than a custom tevent_req destructor.
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
This is consistent with the parameter using milliseconds and the other
warnings in the same file also using milliseconds.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Jan 16 11:19:39 CET 2014 on sn-devel-104
Avoid the parameter lookup for the warning thresholds in the hot code
path by reading them in db_open_ctdb and storing them in the
db_ctdb_ctx.
Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
We need an indication whether we run into the fcntl thundering
herd. fcntl unlock should be blindingly fast in the normal case. If it
takes longer than 5 milliseconds, warn. The timeout can be adapted by
setting
ctdb:unlock_warn_threshold = <number-of-milliseconds>
Reviewed-by: Christof Schmitt <cs@samba.org>
Signed-off-by: Volker Lendecke <vl@samba.org>
